#define MSG_GPRS_MODEL_NO         1
#define MSG_USERNAME         2
#define MSG_PASSWORD         3
#define MSG_TERMINALIP         4
#define MSG_SUB_NET_MASK1         5
#define MSG_APN         6
#define MSG_PHONE_NO_GPRS         7
#define MSG_PREV_T2_DATA         8
#define MSG_PAD1         9
#define MSG_FORCE_REBOOT         10
#define MSG_TRACK2_ENCRYPT         11
#define MSG_HEX_HEADER         12
#define MSG_RESERVED5         13
#define MSG_RESERVED4         14
#define MSG_RESERVED3         15
#define MSG_RESERVED2         16
#define MSG_RESERVED1         17
